Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7986804 | Audio speaker having a removable voice coil | Leif Blackmon | 2011-07-26 |
| 7272237 | Audio speaker having a removable voice coil | Leif Blackmon | 2007-09-18 |
| 6430300 | Cooling mechanism for an audio speaker | Brian Cox, Leif Blackmon | 2002-08-06 |
| 5940522 | Speaker with passive voice coil cooling | David Cahill, Derek Hatchett | 1999-08-17 |